Hou Dong kowtowed like garlic, but Zhu Pingjian's face was as usual.

He just squinted his eyes and said, "This thing is about a white crystal, a bit like refined salt, is it ......?"

"Guess in vain, since it is used by the Heavenly Thunder Gong, his temperament must be the most explosive!"

It was Zhu Pingjin's turn to glare. You can guess it!

"You guessed it! This substance is extremely violent, and must not be hit with heavy pressure, must be handled gently, and must not be mixed with other gold, silver, copper and iron. ”

"I know! This Lei Gong is a heavenly immortal, with a pair of clairvoyance, a pair of ears to the wind, and a delicate heart. ”

Oh my God, you guessed it again!

"That's why the ingredients we use must be absolutely pure! Wear thick gloves made of fine white cotton on your hands, wear a mask made of silk on your mouth, use pure and smooth white porcelain, dig a trench three feet deep in the ground, and ......"

"I know! If you want to get this treasure, you must bathe and change your clothes and fast for three days to show your piety! But the disciples didn't understand, but why did they dig a trench three feet deep? ”

Zhu Pingjin was repeatedly interrupted, and finally became popular.

"No more questions!"

"In vain! Please forgive me! Hou Dong hooked his head.

"Listen!" Zhu Pingjin shouted: "Since this thing is the most violent, as long as this thing has a slight fever, heat, smoke and other symptoms, you will immediately jump into the trench and lie on the ground to save your life!" ”

"Got it! Even if the disciples are crushed to pieces, they must be made into this thunder silver! ”

"You have also listened to the specific preparation method. If you want to get thunder silver, you must first get sulfuric acid. The refining method of sulfuric acid is to combine sulfur powder with fire nitrate mixed with water vapor. Stay until ......"

Zhu Pingjin is talking about the first industrial-scale method of preparing sulfuric acid in history - nitrification. The nitrification process appeared at about the same time as the current era. The method is very simple, that is, Jiang sulfur and potassium nitrate are heated together.

Sulfur and potassium nitrate are not mysterious, they are readily available on the market, and they are also available in Furentang's medicine cabinet, so Zhu Pingjin believes that the probability of success with this method is very high. After he finished talking about the preparation process, he also talked about the appearance and characteristics of sulfuric acid one by one.

"Did the master say alum oil?" Hou Dong's face was full of doubts, "The Dan book says that the essence of stone gall fire refining can be obtained. The apprentice asked the teacher, and the teacher said that this stone gall is alum. Refining with gallium simmering often leaves something oily at the bottom of the furnace. These oily things are the most vicious, and they can burn through the bottom of the furnace every time! If a person does not know how powerful it is, if he touches it with his hands, the skin will be rotten through the flesh, and the bone will be eroded at the worst......"

"What is this alum?" Zhu Pingjin interrupted and asked.

"I have never seen it. The ancestor said that this gall alum is often found in copper mines. It looks like crystal, but it is dark blue or light blue, which is very beautiful. But after a long time, the color will turn gray and white, so it cannot be used as a gemstone. ”

The copper ions are blue, so the gallium must be copper sulfate crystals! Mom, Lao Tzu's mineral knowledge is not as good as that of an ancient alchemist!

Zhu Pingjin thought so in his heart, but he was unwilling to put down his master's shelf. So he said: "The principle of all things is the same end." One life is two, two is three, three is all things, all things are one, so that a cycle can be formed! Bileum can be refined into green alum oil, and green alum oil and copper can be refined into bile alum, which is a reason! In addition to stone gall, this sulfuric acid can also be refined after burning hematite and sulfur, so you have to be more attentive and bold to try! ”

Hou Dong threw himself to the ground in admiration: "It's the same with the apprentice refining dansha!" Ge Shenxian said, Dansha burned into mercury, and accumulated and changed into Dansha. Try it in vain, if it is so, it is really magical! Why? The apprentice was puzzled, and the master just said a word, which made the apprentice suddenly! The master's knowledge is really exhaustive! ”

Alright, I'm not interested in fooling around anymore. Zhu Pingjin yawned and said, "This sulfuric acid has just been made, and it generally contains a lot of water. It is not possible to use it directly, but it is necessary to purify it into concentrated sulfuric acid. This concentrated sulfuric acid can be ...... by adding fire nitrate."

"Is it feasible to use the distillation method of the distillery to purify this sulfuric acid?"

"Probably not, right? Concentrated sulfuric acid has the ability to absorb water, and if you force out the water with high temperature, and the water is sucked back again, isn't this a useless work? ”

"Among the five elements, water and fire are mutually restrictive, water can extinguish fire, and fire can also chase water. Since the distillery can use the distillation method to remove water to obtain alcohol, why can't the disciples use this method to concentrate the sulfuric acid and obtain sulfuric acid essence? ”

"Are you a master or is this son a master?" Zhu Pingjian's eyes are full of gold stars, looking for feather dusters everywhere.

Hou Dong's head hooked down again: "You are a master, and the poor road is a disciple." ”

"Do what you think, don't stick to the way of being a teacher!" Zhu Pingjin waved his hand helplessly, "The acid mist generated by sulfuric acid is highly toxic and must be completely sealed. The acid mist should be adsorbed with charcoal so that impurities can be removed. After the acid mist is generated, it is adsorbed with the previously obtained sulfuric acid, so that the sulfuric acid becomes more and more concentrated. Let me tell you a way to judge the concentration of sulfuric acid: you use a scale to scale, the same jar, the same amount, the heavier the heavier, the more concentrated. ”

"The futile knows that this is because the thick things are denser......"

Hou Dong's remaining words were glared back by Zhu Pingjin. Zhu Pingjin continued: "You order a batch of ceramic jars in the city, and there should be holes on the sides, and the ceramic jars are connected with ceramic pipes, and the joints between the jars and the pipes are sealed with lead. The jar should also have a lead lid on it. Lead is not afraid of sulfuric acid corrosion! ”

Hou Dong wanted to speak and stopped.

"Money is not difficult, people are not difficult, and porcelain workshops are not difficult. The only thing that matters is Thunder Silver! As long as this thing is made, you will be the number one alchemy master in Shudi! ”

"The master is the real master!" It's rare for this guy to be humble.

"This son is this son, nothing else! You are not the apprentice of this son, and you are not allowed to call this son a master in front of outsiders! You see? ”

"Got it! The master means that this Lei Gongyin is a matter of spying on the heavens, how can ordinary mortals let them know? ”

Zhu Pingjin's words came to his lips, but he was choked back alive. But he quickly agreed: "Exactly! ”

"Besides, spying on the heavens is a short-lived thing, and this matter should be borne by the disciples!" Hou Dong is righteous and awe-inspiring.

……

"Concentrated sulfuric acid is the mother of chemicals. With concentrated sulfuric acid, there is nitric acid, and there are many other things. Therefore, to make thunder silver, concentrated sulfuric acid is the key! If you want to get nitric acid, just add fire nitrate to concentrated sulfuric acid. If the concentration of nitric acid is not enough, it is enough to use concentrated sulfuric acid to absorb water. Remember, concentrate sulfuric acid into nitric acid, not the other way around. Otherwise, something will happen! Zhu Pingjin taught earnestly.

"Why is that?"

"Just remember!" Zhu Pingjin yawned again, "Add us mortals to concentrated nitric acid with silver, and this thunder silver will come out!" ”

After giving the answer, Zhu Pingjin remembered something again, poked his head out and said, "Mercury can also be added to this nitric acid to try!" Add it a little bit and see how it reacts. ”

"The ancestor once said that this mercury is the silver used by the gods. Aggregation is impermanent, changeable. In vain, if mercury is added to the nitric acid, it will definitely be able to make fairy silver! ”

"That's a good feeling, you might as well be bold and try! If you want someone to ask for something, just write a note and hand it to Li Sixian, and he will report to this son. But this world must first make it clear to you: if you enter this chemical gate, you will not be able to get out. You'll stay in the temple for the rest of your life, protected by soldiers for twelve hours! ”

"The disciple was originally a monk, alone. Since the master passed on my book of heaven, it is already the greatest blessing for the apprentice, and the apprentice does not dare to ask for more! ”

Zhu Pingjin slapped the table and stood up: "Okay!" As long as you can refine this thunder silver, this world will pass on more to you...... Book from heaven! At that time, you were not only my number one alchemy master in Shudi, but also the first chemical expert in my Ming Dynasty! At that time, the Son of this world will give you a word. ”

"Thank you, Master! What word does the master want to give to the apprentice? ”

"Wait until you're done. However, this word is extraordinary, and can only be enjoyed by chemical experts! ”

"Got it!" In the darkness, Hou Dong's eyes lit up, "That's a certain Tianzun, a certain real person, and the like!" ”

"Don't leak it!"

The night was dark and the streets were silent. Under the escort of the soldiers of the guard platoon, the Yuding Daoist stepped on the stone slabs on the street and returned to Qingyang Palace flutteringly. He lay on the rotten straw mat in the broken house, looking at the starlight oozing from the cracks in the tiles, and couldn't help but laugh out loud. The three inseparable sentences of "chemical industry" in the mouth of the prince of the world, isn't that the transformation of all things in heaven and earth, and the ingenuity of heaven? If you really have this ability, it's not a god, so what?

Zhu Pingjin lay in his bedroom where he breathed in the sun, looking at the carved flowers on the top of the bed and imagining.

"Flickering in another one! With sulfuric acid, it is possible to etch engravings and print banknotes; With sulfuric acid, it is possible to bleach cotton cloth and synthesize dyes; With sulfuric acid, I can then synthesize nitric acid, hydrochloric acid, soda ash, caustic soda. With the three acids and two alkalis in place, I can also make ammonia synthesis, and the grain output will be doubled immediately! Ha ha...... Fan Xudong and Hou Debang, I'm sorry, I will become the father of China's chemical industry. ”

"In the past two days, I just thought about making guns and artillery, and I didn't pay attention to the affairs of the army, and I didn't read the reports from all over the country, which is not good!" He yawned and fell asleep with his eyes closed.